JPH08128884A - Load detecting device - Google Patents
Load detecting deviceInfo
- Publication number
- JPH08128884A JPH08128884A JP26568494A JP26568494A JPH08128884A JP H08128884 A JPH08128884 A JP H08128884A JP 26568494 A JP26568494 A JP 26568494A JP 26568494 A JP26568494 A JP 26568494A JP H08128884 A JPH08128884 A JP H08128884A
- Authority
- JP
- Japan
- Prior art keywords
- load
- displacement
- leaf spring
- electric signal
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/11—Leaf spring
- B60G2202/112—Leaf spring longitudinally arranged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/11—Mounting of sensors thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/60—Load
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車に搭載され、荷
重または積載量にしたがって制御を行うコンピュータ装
置に利用する。本発明は、坂道発進補助装置、自動変速
装置、アンチスキッド・ブレーキ装置、自動空気ばね制
御装置、駆動軸荷重制御装置、その他そのときの荷重に
したがって制御条件を変更する制御装置に利用する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a computer device mounted on an automobile and controlled according to a load or a load amount. INDUSTRIAL APPLICABILITY The present invention is used for a slope start assist device, an automatic transmission device, an anti-skid brake device, an automatic air spring control device, a drive shaft load control device, and other control devices that change control conditions according to the load at that time.
【０００２】[0002]
【従来の技術】トラックまたはバスなどでは、荷重の小
さいときと大きいときとでは、その運転条件に大きな違
いがあり、各種制御装置では荷重を自動的に検出しその
荷重の値にしたがって制御条件を変更するように構成さ
れている。たとえば、自動変速装置では、荷重が大きい
ときには荷重が小さいときに比べて低速ギヤを長く使用
するように制御する。2. Description of the Related Art For trucks or buses, there is a large difference in operating conditions between when the load is small and when the load is large. Various control devices automatically detect the load and adjust the control conditions according to the value of the load. Is configured to change. For example, in the automatic transmission, the low speed gear is controlled to be used longer when the load is large than when the load is small.
【０００３】このための装置として実開昭６２−１９８
１１２号公報または特公昭５３−２１９６２号公報に記
載された技術が知られている。As a device for this purpose, Japanese Utility Model Laid-Open No. 62-198
The technology described in Japanese Patent Publication No. 112 or Japanese Patent Publication No. 53-21962 is known.
【０００４】[0004]
【発明が解決しようとする課題】従来、トラックまたは
バスなどにかかる荷重の検出は、車軸にストレインゲー
ジを取付け、積載量によって異なる車軸の歪量を計測す
る、あるいはストロークセンサを用いて車高の変化量を
測定することによって行われていた。Conventionally, the load applied to a truck or a bus is detected by mounting a strain gauge on the axle and measuring the amount of strain on the axle that varies depending on the load, or by using a stroke sensor to detect the vehicle height. It was done by measuring the amount of change.
【０００５】車高の変化量により積載荷重を検出しよう
とする場合には、積載量によって変化するリーフスプリ
ングの変位をストロークセンサにより検出し、これを電
気信号として取込み、この電気信号に基づき荷重に相当
する値が演算される。ところが大型車両のリーフスプリ
ングは、極めて強い弾性力を有しているとともに、複数
枚の板ばね材の相互間の摩擦が利用されているために、
その荷重特性にはヒステリシスがあり、一定の荷重に対
する変位量は一定にならないので、変位量を検出してそ
れを真の荷重として特定することができない問題があ
る。When the load is to be detected by the amount of change in vehicle height, the displacement of the leaf spring, which changes depending on the load, is detected by a stroke sensor, which is taken in as an electric signal, and the load is detected based on this electric signal. The corresponding value is calculated. However, the leaf spring of a large vehicle has an extremely strong elastic force, and because the friction between a plurality of leaf spring materials is utilized,
Since the load characteristic has hysteresis and the displacement amount for a constant load is not constant, there is a problem that the displacement amount cannot be detected and specified as a true load.
【０００６】本発明は、積載量をリーフスプリングの変
位によって求める場合に、リーフスプリングにヒステリ
シスがあっても、車両にかかる荷重を正確に求めること
ができる装置を提供することを目的とする。本発明はそ
のときの荷重にしたがって制御条件が変更される各種制
御を異なった情報で行われないようにする装置を提供す
ることを目的とする。It is an object of the present invention to provide a device capable of accurately determining the load applied to a vehicle when the load capacity is determined by the displacement of the leaf spring, even if the leaf spring has hysteresis. It is an object of the present invention to provide a device that prevents various types of control in which control conditions are changed according to the load at that time from being performed with different information.
【０００７】本発明は、ヒステリシスの影響を除くため
に、機械的な操作を必要としない装置を提供することを
目的とする。本発明は時間の経過によって計測値に相違
がなく安定した値を検出できる装置を提供することを目
的とする。It is an object of the present invention to provide a device which does not require mechanical manipulation to eliminate the effects of hysteresis. It is an object of the present invention to provide a device capable of detecting a stable value with no difference in measured values over time.
【０００８】[0008]
【課題を解決するための手段】本発明は、リーフスプリ
ングの変位による荷重の検出を正確に行えるようにし、
そのときの荷重の値にしたがって制御条件が設定される
各種制御を正しい入力情報で実行できるようにすること
を特徴とする。According to the present invention, it is possible to accurately detect a load due to displacement of a leaf spring,
It is characterized in that various controls in which control conditions are set according to the load value at that time can be executed with correct input information.
【０００９】すなわち、車軸と車台との間の相対的機械
変位を電気信号として取込む手段と、この電気信号に基
づき荷重に相当する値を演算する手段とを備えた荷重検
出装置において、前記取込む手段は、車両の走行時に前
記電気信号を多数ｎ回取込む手段を含み、前記演算する
手段は、このｎ回の電気信号の値について平均値を演算
する手段を含むことを特徴とする。That is, in the load detecting device provided with means for taking in the relative mechanical displacement between the axle and the chassis as an electric signal, and means for computing a value corresponding to the load based on this electric signal. The means for taking in includes a means for taking in the electric signal a large number of times n when the vehicle is traveling, and the means for calculating includes means for calculating an average value of the values of the electric signal for the n times.
【００１０】車輪の回転パルスを取込み計数する手段
と、この計数する手段の一定計数値毎に前記電気信号を
取込む手段とを備え、前記ｎは数百を越える数に設定さ
れることが望ましい。It is desirable to have means for taking in and counting the rotation pulse of the wheel and means for taking in the electric signal for each constant count value of the counting means, and it is desirable that n is set to a number exceeding several hundreds. .
【００１１】[0011]
【作用】リーフスプリングの荷重特性には、図４に示す
ようにヒステリシスループが現れ、空車状態および積車
状態のいずれの場合も同一荷重に対する変位量がその変
化の方向により異なり理論値に一致しない。この問題を
解決するためにある時間内に短い周期でリーフスプリン
グに荷重を加え、その変位量の平均値を求めると一定の
値に収束する。本発明はこの実験結果に基づくもので、
車両を一定距離にわたり走行させている間にリーフスプ
リングが示す車軸と車台との間の相対的な機械変位を電
気信号として一定計数値毎に数百を越える回数分取込
み、この数百を越える電気信号について平均値を演算す
る。ただし、路面の大きな凹凸による大きな変位値は異
常値として除外する。In the load characteristics of the leaf spring, a hysteresis loop appears as shown in FIG. 4, and the displacement amount for the same load varies depending on the direction of change and does not match the theoretical value in both empty and loaded states. . In order to solve this problem, a load is applied to the leaf spring in a short period within a certain time, and the average value of its displacement amounts is converged to a constant value. The present invention is based on the results of this experiment,
While the vehicle is traveling for a certain distance, the relative mechanical displacement between the axle and the chassis indicated by the leaf spring is captured as an electric signal for each constant count value more than several hundred times Calculate the average value for the signal. However, large displacement values due to large irregularities on the road surface are excluded as abnormal values.
【００１２】これにより、荷重と変位との関係を示すば
ね特性が一対一に対応する理論値に近づけられ、安定し
た積載重量に相当する変位量を検出することができ、そ
のときの荷重によって制御条件を変更する各制御装置が
その一定の値にしたがって制御を行うことができる。As a result, the spring characteristic showing the relationship between the load and the displacement is brought close to the theoretical value corresponding to one-to-one, and the displacement amount corresponding to the stable load weight can be detected. Each control device that changes the condition can perform control according to the constant value.
【００１３】[0013]
【実施例】次に、本発明実施例を図面に基づいて説明す
る。図１は本発明実施例の要部の構成を示す図、図２は
本発明実施例の要部の構成を示すブロック図である。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a main part of an embodiment of the present invention, and FIG. 2 is a block diagram showing a configuration of a main part of the embodiment of the present invention.
【００１４】本発明実施例は、車軸と車台との間に備え
られたリーフスプリング１の機械的変位を検出し電気信
号として送出するストローク・センサ２と、車輪の回転
パルスを検出し電気信号として送出する回転センサ３
と、ストローク・センサ２からの電気信号に基づき荷重
に相当する値を演算する制御回路４とを備える。本発明
の特徴として、ストローク・センサ２に、車両の走行時
にリーフスプリング１の変位を多数ｎ回（数百を越える
数）検出する手段が含まれ、制御回路４に、ストローク
・センサ２からの多数ｎ回の電気信号を取込む手段と、
この多数ｎ回の電気信号の値について平均値を演算する
手段と、回転センサ３からの車輪の回転パルスを取込み
計数する手段と、この計数手段の一定計数毎に電気信号
を取込む手段と、演算された荷重に相当する値を坂道発
進補助装置１１、自動変速装置１２、アンチスキッド・
ブレーキ装置１３、自動空気ばね制御装置１４、駆動軸
荷重制御装置１５などに送出する手段とが含まれる。In the embodiment of the present invention, the stroke sensor 2 for detecting the mechanical displacement of the leaf spring 1 provided between the axle and the chassis and sending it out as an electric signal, and the rotation pulse of the wheel for detecting it as an electric signal. Rotation sensor 3 to send
And a control circuit 4 for calculating a value corresponding to the load based on the electric signal from the stroke sensor 2. As a feature of the present invention, the stroke sensor 2 includes means for detecting the displacement of the leaf spring 1 a large number of times n (more than several hundreds) when the vehicle is running, and the control circuit 4 includes a means for detecting the displacement of the stroke sensor 2. Means for capturing a large number of n times of electric signals,
A means for calculating an average value of the values of the electric signal for a large number of n times, a means for taking in and counting wheel rotation pulses from the rotation sensor 3, and a means for taking in an electric signal at every constant count of the counting means. The value corresponding to the calculated load is applied to the slope start assist device 11, the automatic transmission 12, the anti-skid
Means for delivering to the braking device 13, the automatic air spring control device 14, the drive shaft load control device 15, etc. are included.
【００１５】次に、このように構成された本発明実施例
の動作について説明する。図３は本発明実施例における
制御動作の流れを示す流れ図、図４は本発明実施例にか
かわるリーフスプリングのばね特性の一例を示す図であ
る。Next, the operation of the embodiment of the present invention thus constructed will be described. FIG. 3 is a flow chart showing a flow of control operation in the embodiment of the present invention, and FIG. 4 is a diagram showing an example of spring characteristics of a leaf spring according to the embodiment of the present invention.
【００１６】リーフスプリング１は強い弾性力を有する
板ばねが複数枚重ね合わされているために、荷重を増加
したときに示す変位量と除荷したときに示す変位量とが
異なるヒステリシスループが現れ、そのために同一荷重
であっても変位を検出するたびにその値が異なる。すな
わち、図４に示すように、空車Ａの状態から荷重を増加
しＢの状態になったときに、変位量はδA からδB に変
化する。ところが除荷してゆくとＢ点がＣ点に変化し、
さらにＤ点を経由して空車状態になったときにＥ点にな
る。そのため、同一変位でもその荷重値は例えばＰとＱ
に示されるように大きな差を生じる。つまり測定条件に
より検出した荷重につきバラツキを生じる。Since a plurality of leaf springs having a strong elastic force are superposed on the leaf spring 1, a hysteresis loop appears in which the displacement amount when the load is increased and the displacement amount when the load is unloaded differ. Therefore, even if the load is the same, the value is different each time the displacement is detected. That is, as shown in FIG. 4, when the load is increased from the state of the empty vehicle A to the state of B, the displacement amount changes from δ A to δ B. However, when the load is removed, point B changes to point C,
Furthermore, when the vehicle becomes empty via point D, the point becomes point E. Therefore, even if the displacement is the same, the load values are, for example, P and Q.
It makes a big difference as shown in. That is, the load detected varies depending on the measurement conditions.
【００１７】本発明は図４の２点鎖線で示すように変位
と荷重が一対一に対応する理論値に近い値を演算して制
御に利用するもので、走行が開始されたときからある距
離に達するまでの間に車軸と車台との間の相対的機械変
位を多数回取込みその平均値を演算することにより理論
値に近い値を得るものである。The present invention calculates and uses a value close to a theoretical value in which the displacement and the load have a one-to-one correspondence as shown by the chain double-dashed line in FIG. 4, and uses the value for control. A value close to the theoretical value is obtained by taking in the relative mechanical displacement between the axle and the chassis a number of times and calculating the average value thereof until reaching.
【００１８】まず、制御回路４は回転センサ３からの出
力を取込み、車両が走行を開始したか否かを判定する。
走行開始状態であれば回転センサ３からの車輪の回転パ
ルスを取込む。この回転パルスは例えば車輪１回につき
１０パルス程度である。この回転パルスを計数し、一定
計数値毎、例えば車輪の８分の１回転毎にストローク・
センサ２からリーフスプリング１の変位量を取込む。た
だし、路面の大きな凹凸による大きな変位値は異常値と
して除外される。この変位量の取込みをある距離Ｌｋｍ
（例えば２ｋｍ）までの間継続し、荷重に相当する検出
値として平均値を演算する。次いで、この演算された平
均値をそのときの荷重の検出値として、荷重の値にした
がって制御を行う坂道発進補助装置１１、自動変速装置
１２、アンチスキッド・ブレーキ装置１３、自動空気ば
ね制御装置１４、駆動軸荷重制御装置１５などの制御装
置に送出する。First, the control circuit 4 takes in the output from the rotation sensor 3 and determines whether or not the vehicle has started running.
If the vehicle is in the running start state, the wheel rotation pulse from the rotation sensor 3 is taken in. This rotation pulse is, for example, about 10 pulses per wheel. This rotation pulse is counted, and the stroke is counted at a constant count value, for example, every ⅛ rotation of the wheel.
The displacement amount of the leaf spring 1 is taken in from the sensor 2. However, large displacement values due to large irregularities on the road surface are excluded as abnormal values. This displacement is taken in at a certain distance Lkm
It continues for up to (for example, 2 km), and an average value is calculated as a detection value corresponding to the load. Next, using the calculated average value as the detected load value at that time, a slope start assist device 11, an automatic transmission device 12, an anti-skid / brake device 13, and an automatic air spring control device 14 that perform control according to the load value. , To the control device such as the drive shaft load control device 15.
【００１９】[0019]
【発明の効果】以上説明したように本発明によれば、荷
重に相当するリーフスプリングの変位量を一対一に対応
する理論値に近い範囲で検出することができ、荷重の変
化にしたがって制御条件が変更される各種制御装置がバ
ラツキのない一定の検出値で制御を行うことができる効
果がある。本発明の実施は複雑なハードウェアの構成を
要せずにソフトウェアで行うことができる。As described above, according to the present invention, the amount of displacement of the leaf spring corresponding to the load can be detected within a range close to the theoretical value corresponding to one-to-one, and the control condition can be adjusted according to the change of the load. There is an effect that various control devices whose values are changed can perform control with a constant detection value without variation. Implementation of the present invention can be performed by software without requiring a complicated hardware configuration.
【図１】本発明実施例の要部の構成を示す図。FIG. 1 is a diagram showing a configuration of a main part of an embodiment of the present invention.
【図２】本発明実施例の要部の構成を示すブロック図。FIG. 2 is a block diagram showing a configuration of a main part of an embodiment of the present invention.
【図３】本発明実施例における制御動作の流れを示す流
れ図。FIG. 3 is a flowchart showing a flow of control operation in the embodiment of the present invention.
【図４】本発明実施例にかかわるリーフスプリングのば
ね特性の一例を示す図。FIG. 4 is a diagram showing an example of spring characteristics of a leaf spring according to an embodiment of the present invention.
１ リーフスプリング ２ ストローク・センサ ３ 回転センサ ４ 制御回路 １１ 坂道発進補助装置 １２ 自動変速装置 １３ アンチスキッド・ブレーキ装置 １４ 自動空気ばね制御装置 １５ 駆動軸荷重制御装置 1 Leaf Spring 2 Stroke Sensor 3 Rotation Sensor 4 Control Circuit 11 Slope Start Aid Device 12 Automatic Transmission Device 13 Anti-Skid Brake Device 14 Automatic Air Spring Control Device 15 Drive Axis Load Control Device
Claims (2)
気信号として取込む手段と、この電気信号に基づき荷重
に相当する値を演算する手段とを備えた荷重検出装置に
おいて、 前記取込む手段は、車両の走行時に前記電気信号を多数
ｎ回取込む手段を含み、 前記演算する手段は、このｎ回の電気信号の値について
平均値を演算する手段を含むことを特徴とする荷重検出
装置。1. A load detection device comprising: means for taking in a relative mechanical displacement between an axle and a chassis as an electric signal; and means for calculating a value corresponding to a load based on the electric signal. The loading means includes a means for capturing the electric signal a large number of times n when the vehicle is running, and the calculating means includes a means for calculating an average value of the values of the electric signal n times. Detection device.
と、この計数する手段の一定計数値毎に前記電気信号を
取込む手段とを備え、前記ｎは数百を越える数に設定さ
れた請求項１記載の荷重検出装置。2. A means for taking in and counting a wheel rotation pulse, and means for taking in the electric signal for each constant count value of the counting means, wherein n is set to a number exceeding several hundreds. Item 1. The load detection device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26568494A JPH08128884A (en) | 1994-10-28 | 1994-10-28 | Load detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26568494A JPH08128884A (en) | 1994-10-28 | 1994-10-28 | Load detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08128884A true JPH08128884A (en) | 1996-05-21 |
Family
ID=17420572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26568494A Pending JPH08128884A (en) | 1994-10-28 | 1994-10-28 | Load detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08128884A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786147A (en) * | 2018-06-27 | 2018-11-13 | 广东高乐玩具股份有限公司 | A kind of toy weighing device of Anti-inclining |
| WO2020221613A1 (en) * | 2019-04-30 | 2020-11-05 | Wabco Gmbh | Method for determining an axle load on a mechanically suspended vehicle |
| JP2021043147A (en) * | 2019-09-13 | 2021-03-18 | いすゞ自動車株式会社 | Weight estimation device and vehicle |
| CN113902606A (en) * | 2021-12-09 | 2022-01-07 | 比亚迪股份有限公司 | Vehicle passenger flow monitoring method, computer device and storage medium |
-
1994
- 1994-10-28 JP JP26568494A patent/JPH08128884A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786147A (en) * | 2018-06-27 | 2018-11-13 | 广东高乐玩具股份有限公司 | A kind of toy weighing device of Anti-inclining |
| WO2020221613A1 (en) * | 2019-04-30 | 2020-11-05 | Wabco Gmbh | Method for determining an axle load on a mechanically suspended vehicle |
| CN113710512A (en) * | 2019-04-30 | 2021-11-26 | 采埃孚商用车系统汉诺威有限公司 | Method for determining the axle load on a mechanically suspended vehicle |
| JP2021043147A (en) * | 2019-09-13 | 2021-03-18 | いすゞ自動車株式会社 | Weight estimation device and vehicle |
| CN113902606A (en) * | 2021-12-09 | 2022-01-07 | 比亚迪股份有限公司 | Vehicle passenger flow monitoring method, computer device and storage medium |
| CN113902606B (en) * | 2021-12-09 | 2022-04-15 | 比亚迪股份有限公司 | Vehicle passenger flow monitoring method, computer device and storage medium |
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